US3923683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amides and hydrophobic silica as antifoams
Assignee: ChampionX LLC
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Filing: 1974-01-09
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Granted: 1975-12-02
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Expires: 1994-01-09
Abstract
Abstract A Brown Stock Wash Aid antifoam composition comprising a blend of a bis-amide, a liquid hydrocarbon oil, finely divided hydrophobic silica and silicone oil.
Inventors
- 👤 Raymond J Michalski
- 👤 Roger W Youngs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:28
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/10; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
AN ANTIFOAM COMPOSITION COMPRISING A BLEND OF: A. A LIQUID HYDROCARBON OIL HAVING CONCENTRATION RANGING BETWEEN 70 TO 98.8% BY WEIGHT, B. A FINELY DIVIDED HYDROPHOBIC SILICA HAVING A CONCENTRATION RANGING BETWEEN 0.1 TO 5.0% BY WEIGHT, C. A BIS-AMIDE IN A CONCENTRATION RANGING BETWEEN 1 TO 20% BY WEIGHT HAVING THE FOLLOWING STRUCTURE:
Claim 2
Dependent Claim
54 words
AN ANTIFOAM COMPOSITION COMPRISING A BLEND OF: A. A LIQUID HYDROCARBON OIL HAVING CONCENTRATION RANGING BETWEEN 70 TO 98.8% BY WEIGHT, B. A FINELY DIVIDED HYDROPHOBIC SILICA HAVING A CONCENTRATION RANGING BETWEEN 0.1 TO 5.0% BY WEIGHT, C. A BIS-AMIDE IN A CONCENTRATION RANGING BETWEEN 1 TO 20% BY WEIGHT HAVING THE FOLLOWING STRUCTURE:
Claim 3
Dependent Claim
58 words
An antifoam composition comprising a blend of: A. a liquid hydrocarbon oil having the preferred concentration ranging between 86 to 93% by weight; B. a finely divided hydrophobic silica having the preferred concentration ranging between 1.0 to 2.0% by weight; C. a bis-amide in the preferred concentration ranging between 5 to 10% by weight having the following structure:
Claim 4
Dependent Claim
58 words
An antifoam composition comprising a blend of: A. a liquid hydrocarbon oil having the preferred concentration ranging between 86 to 93% by weight; B. a finely divided hydrophobic silica having the preferred concentration ranging between 1.0 to 2.0% by weight; C. a bis-amide in the preferred concentration ranging between 5 to 10% by weight having the following structure:
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein the preferred hydrocarbon oil is paraffin oil.
Claim 6
Dependent Claim
13 words
The composition of claim 1 wherein the preferred value of n is 1.
Claim 7
Dependent Claim
13 words
The composition of claim 1 wherein the preferred amide is methylene is stearmide.
Claim 8
Dependent Claim
42 words
An antifoam composition comprising a blend of: A. paraffin oil having a concentration of 88%; B. finely divided hYdrophobic silica having a concentration of 1%; C. methylene bis stearamide having a concentration of 10%; and D. polydimethylsiloxane having a concentration of 1%.
Claim 9
Dependent Claim
42 words
An antifoam composition comprising a blend of: A. paraffin oil having a concentration of 88%; B. finely divided hYdrophobic silica having a concentration of 1%; C. methylene bis stearamide having a concentration of 10%; and D. polydimethylsiloxane having a concentration of 1%.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |